.gradient {
    position: relative;
    float: left;
    width: calc(30% - 20px);
    height: 310px;
    background-color: white;
    margin-right: 50px;
    margin-bottom: 50px;
    border-radius: 16px;
    overflow: hidden;
}

.gradient__background {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    top: 0;
    margin: auto;
    border-radius: 50%;
    height: 250px;
    width: 250px;
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;

}